I think you've forgotten that alcohol is such a drug that makes it harder to resist. It doesn't matter why the drug is in your system. So this situation goes back to the rape category.
Guess which of us that makes more likely to be morally right about this issue. I'll save you the trouble; it's me. If you are wrong about what is not rape, you've raped somebody. It's not hard to get clear consent.
Yes, actually, I don't have any doubts about it. I'm removing the capacity for doubt by being responsibly cautious. That's my responsibility. That's our responsibility. It's not even remotely fantasy to consider this.